JPS64177B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a carriage sliding device that is an improved carriage unit used in automatic assembly machines, etc., and in particular, a fixed member is equipped with a single piston that reciprocates with fluid. The present invention relates to an epoch-making carriage sliding device in which a driving device is built into the carriage unit itself so that the carriage slides back and forth by supplying and discharging fluid to both sides of a piston.

Conventionally, a device that slides a carriage inserted into a fixed member merely has a guiding function for high-precision reciprocating motion, and in order to provide driving force to it, it is necessary to For example, by fixing an arm member that reciprocates integrally with the piston of an air cylinder,
The reciprocating movement of the piston required the reciprocating movement of the carriage. As described above, the conventional carriage sliding device has the disadvantage that the air cylinder must be provided independently, which inevitably requires a large space and the device as a whole becomes large. In order to eliminate such drawbacks, the applicant of the present application, in Japanese Patent Application No. 58-89854, installed a pair of integrally formed pistons that reciprocate with fluid in two cylinder chambers formed in a fixed member. A connecting pin that passes through the fixed member and is inserted into a connecting hole formed in the carriage is attached to the intermediate part of these pistons, and the pistons are reciprocated by supplying and discharging fluid to the cylinder chamber, and the connecting pin We have proposed a carriage sliding device configured to allow the carriage to reciprocate and slide along a fixed member via.

However, in this device, the length of the fixing member equal to the stroke of each movement of the pair of pistons plus the stroke of movement of the connecting pin, that is, the total length of the device is required. Therefore, in the case of a small reciprocating sliding device with a small individual stroke, the total length will not be very long, but in the case of a large stroke, for example, if the stroke is 15 mm or more,
The disadvantage was that the overall length of the device was quite long.

In addition, Utility Model Application No. 56-137929 discloses a piping device for a feed unit, but in this conventional example, the feed cylinder device is configured as a separate part from the device, making it easy to replace. The structure is completely different from that of the present invention in which the cylinder is integrated with the device to make the whole compact. Further, in this conventional example, the piston rod protruding from the cylinder is in a cantilevered state, and the reaction force against the piston rod immediately acts on the bearing portion of the cylinder, which is disadvantageous in terms of durability.

The present invention has been made to eliminate the above-mentioned drawbacks of the prior art, and its purpose is to incorporate a drive device using fluid pressure such as air as a drive source into the carriage unit itself. Then,
The objective is to enable the carriage unit to be used as a sliding device with a driving function without changing its size, and thereby to downsize the entire device and significantly reduce the installation space. It is. Another objective is to minimize the offset of the acting force by locating the piston that generates the driving force very close to the carriage that is subjected to the load, thereby reducing the torsional force applied to the carriage. The goal is to reduce losses. Another object is to reduce the cylinder load by reducing the loss of driving force in this manner, thereby making the cylinder durable for frequent use. Still another object is to improve the movement of the connecting pin in a single-acting piston (for example, Japanese Patent Application No. 58-89854) by making the piston a double-acting type and providing a connecting pin at the other end of the piston. To provide a carriage sliding device that does not require unnecessary strokes and can shorten the total length by about 1/3 if the stroke of the same carriage. Another purpose is to enable the carriage to be used by rotating it 180 degrees relative to the fixed member, so that it can be used even if the installation location of the pipe for the pipe fitting attached to the carriage is changed. It is to do so. Another purpose is to support a reciprocating carriage that slides against a fixed member with a long bearing that is integrated with the fixed member, so that even if the stroke of the carriage becomes very large, it can be reciprocated with excellent load resistance. The purpose is to obtain a platform sliding device. Still another object is to form a large diameter portion at one end of the piston rod protruding from the cylinder chamber, and configure the piston rod so that the one end of the piston rod is supported by the cylinder chamber on the side of the connecting pin moving portion via the large diameter portion. Therefore, the reaction force acting on the piston rod from the reciprocating table is prevented from immediately acting on the bearing portion of the cylinder chamber, that is, the partition member, thereby improving durability.

In short, the present invention provides a fixed member forming a cylinder chamber, a reciprocating table into which the fixed member is slidably inserted via a bearing device, and a reciprocating table that connects the cylinder chamber to a piston sliding section and a connecting pin moving section. a partition member fixed to the cylinder chamber so as to divide it into two chambers; and a connecting pin moving portion of the cylinder chamber that is slidably fitted into the piston sliding portion of the cylinder chamber and inserted into the partition member. a piston having a connecting pin attached to one end of a piston rod protruding from the piston rod, the connecting pin penetrating through the fixing member and being fitted into a connecting hole formed in the reciprocating table; A slidable large diameter portion is formed in the cylinder chamber on the side of the connecting pin moving portion, and the piston rod protruding from the partition member is supported by the cylinder chamber on the side of the connecting pin moving portion via the large diameter portion. and configured to reciprocate the piston by supplying and discharging fluid to both sides of the piston in the cylinder chamber, and to reciprocate the reciprocating table along the fixed member via the connecting pin. It is characterized by the fact that

The present invention will be explained below based on embodiments shown in the drawings. The carriage sliding device 1 according to the present invention includes a fixed member 2, a carriage 3, a partition member 4, and a piston 5.
It is equipped with

The fixing member 2 is fixed to a base 8, and a hollow cylinder chamber 10 is formed therethrough in the longitudinal direction. Fixed member 2
A cylinder lid 11 is fixed to one end via a seal member 11a, and as shown in FIGS. 1 and 2, a pair of threaded portions 11 are formed on the surface.
A pair of pipe joints 12 and 13 are fixed to b and 11c. Further, a lid member 14 is fixed to the other end of the fixing member 2, and the lid member and the cylinder lid 1
1, the cylinder chamber 10 is sealed. Also, a pair of pipe joints 12, 13
A solenoid valve (not shown) is connected to a solenoid valve (not shown), which is connected to an air tank (not shown) containing a fluid such as air, and the action of the solenoid valve causes the pipe joint 12, 13, air is alternately supplied to the cylinder chamber 10 and air is discharged from the cylinder chamber.

The carriage 3 is formed in a U-shape so as to straddle the fixed member 2 in the longitudinal direction.
As shown in FIGS. 3 and 7, the fixing member 2
A recess 2a formed on the left and right side surfaces of the recess 2a, and recesses 3a and 3b formed inside the carriage 3 opposite to the recess.
A bearing device, for example, a ball bearing 16 in which a plurality of balls 19 housed in a flat plate 18 are supported by two rods 20 from both sides, is bonded between the two ends of the carriage 3. Movement in the longitudinal direction is restricted by a cover plate 22. In FIG. 3, on the other hand, for example, the ball bearing 16 on the right side is pressed by a plurality of retaining screws 28 screwed onto the fixing member 2 via a retaining plate 25. It absorbs the lateral play of the carriage 3 and maintains high accuracy.

As shown in FIGS. 4 and 7, the back surface of the carriage 3 has elongated holes 3c into which two guide pins 30, which are implanted on the top surface of the fixed member 2 with the cylinder chamber 10 in between, are loosely fitted. It is formed. Further, as shown in FIGS. 2 and 3, a fixing member 2 is provided on the top surface of the carriage 3.
Four mounting holes 2b formed through the top surface of
Four working holes 3d are formed facing the
Furthermore, four threaded portions 3e are formed for attaching objects such as a clamp mechanism for automatic machines using mounting screws (not shown).

The partition member 4 includes a stepped portion 10c formed in the cylinder chamber 10, the partition member 4, and the cylinder lid so as to divide the cylinder chamber 10 into two chambers: a piston sliding portion 10a and a connecting pin moving portion 10b. 11
The cylinder liner 32 made of steel is interposed in the cylinder chamber 10 between the cylinder liner 32 and the cylinder liner 32, and airtightness is maintained by an O-ring 33 press-fitted into the annular groove 4a.

The piston 5 consists of a main body 34 and a piston rod 36 screwed onto the main body.The piston 5 is kept airtight by a piston ring 38 press-fitted into a pair of annular grooves 34a formed in the main body 34. It is slidably inserted into the liner 32. The piston rod 36 is inserted into the partition member 4 via the seal member 40 and projects into the connecting pin moving portion 10b. A hole 36b formed in a large diameter portion 36a formed at the tip of the piston rod 36 is loosely fitted into an elongated hole 2c formed through the fixed member 2, and is inserted into a connecting hole 3f formed in the carriage 3 without any gap. The connecting pin 43 to be fitted is loosely fitted with an appropriate gap.

Then, the piston rod 36 protruding from the partition member 4 passes through the large diameter portion 36a to the connecting pin moving portion 1.
It is configured to be supported by the cylinder chamber 10 on the 0b side.

Then, air is supplied from the cylinder cover 11 via the pipe joint 12 to the left chamber 10d in the piston sliding portion 10a of the cylinder chamber 10, and air is discharged from the left chamber or via the pipe joint 13 to the cylinder. The piston sliding part 1 passes from the lid 11 through the flow path 10e.
The piston 5 is reciprocated by the air supplied to the right chamber 10f in the right chamber 10f and the air discharged from the right chamber, and the reciprocating table 3 is moved along the fixing member 2 via the connecting pin 43 as shown in FIG. As shown, it is configured to reciprocate in the direction of arrow AB. Further, the carriage sliding device 1 is equipped with a stopper device 50 and a position detection device 51.
0, as shown in FIG. 4, consists of a pair of abutting members 52, 53 attached to the fixed member 2, and a stopper 54 fixed to the carriage 3 between these abutting members and protruding downward. It's summery. Furthermore, an elastic member 55 made of rubber or the like is attached to the tips of the abutment members 52 and 53.

As shown in FIG. 1, the position detection device 51 includes a pair of micro-switches 56 and 58 arranged at a constant interval on the fixed member 2, and a mounting base 50 fixed to the front end surface of the carriage 3. It consists of detection rods 62 and 64 protruding and arranged on the left and right in parallel with the sliding direction of the carriage 3, that is, the direction of arrow A-B,
These detection rods are connected to micro switches 56 and 58.
The position of the carriage 3 is detected by contacting the respective actuators 56a and 58a, and a signal is sent to the electromagnetic valve, which causes the piston sliding part 1 of the cylinder chamber 10 to move.
The supply or discharge of air to 0a is controlled.

In FIG. 2, 70 is a working hole for opening the flow path 10e, and 71 is a pin for filling the working hole.

The present invention is configured as described above, and its operation will be explained below. As shown in FIG. 7, first, the fixing member 2 is fixed by screwing the mounting screw 66 inserted into the base 8 into the threaded portion 2d. In this case, if the base 8 is thick, a threaded portion may be provided on the base, and a mounting screw may be screwed into the threaded portion to secure the fixing member 2. Fourth
5 and 5, the piston 5 is in the leftmost position, and when the detection rod 62 contacts the actuator 56a of the micro switch 56 and a signal is sent to the solenoid valve, Air is supplied from the air tank to one of the pipe joints 12 by the action of 43 to the right along with the carriage 3, and the stopper 54 comes into contact with the abutting member 53 and stops.

At this time, the air accommodated in the right chamber 10f passes through the flow path 10e and is discharged to the outside from the solenoid valve via the pipe joint 13. When the piston 5 moves to the rightmost position along with the carriage 3 via the connecting pin 43, the detection rod 64 comes into contact with the actuator 58a of the micro switch 58, and the action of the solenoid valve is switched. The supply of air from one pipe joint 12 is stopped, and air is instead supplied to the other pipe joint 13. Then, air flows into the right chamber 10f of the piston sliding portion 10a through the flow path 10e, and this air pressure causes the piston 5 to slide to the left along with the carriage 3 via the connecting pin 43. death,
The carriage 3 stops at a position where the stopper 54 abuts against the abutment member 54. At this time, the piston sliding part 1
The air stored in the left chamber 10d of 0a is transferred to the pipe joint 1
2 and is discharged to the outside from the solenoid valve. In this way, the piston 5 is placed in the leftmost position with the connecting pin 43
When moving with the carriage 3 through the detection rod 6
2 is the actuator 56 of the micro switch 56
a, the action of the solenoid valve is switched, the supply of air from the other pipe joint 13 is stopped, and air is supplied to one pipe joint 12 instead.

Through such repetition, the piston 5 reciprocates left and right together with the carriage 3. At this time, the length of the cylinder chamber 10 may be approximately 2L, assuming that each stroke of the main body 34 of the piston 5 and the connecting pin 43 is L. For example, if the length of the cylinder chamber 10 is 100 mm, the length of the cylinder chamber in the case of the single-acting cylinder mechanism shown in the above-mentioned Japanese Patent Application No. 58-89854 is approximately 150 mm, and the carriage sliding device according to the present invention According to No. 1, the length of the cylinder chamber 10 can be shortened by about 1/3.

Furthermore, even when the piston rod 36 protrudes from the partition member 4, since the large diameter portion 36a of the piston rod is supported by the cylinder chamber 10, it is very strong against bending force, and the reaction force acting from the carriage 3 That is, since the bending force does not immediately act on the partition member 4, its durability is improved.

Since the present invention is constructed and operates as described above, the carriage unit itself has a built-in drive device that uses fluid pressure such as air as a driving source, so that the carriage unit can be reduced in size as it is. Can be used as a sliding device with drive function,
As a result, the entire device is miniaturized and the installation space is significantly reduced. In addition, since the piston that generates the driving force is placed very close to the carriage that is subjected to the load, the offset of the acting force is extremely small, reducing the torsional force applied to the carriage and reducing the loss of driving force. There is a certain effect.
In addition, since such loss of driving force is reduced, the cylinder load is reduced, which has the effect of being able to withstand frequent use. In addition, since the piston is a double-acting type and a connecting pin is provided at the other end of the piston, there is no need for unnecessary strokes for moving the connecting pin as in single-acting pistons, and even if the stroke of the same carriage is used, For example, it is possible to obtain a carriage sliding device with a short overall length. Furthermore, since the carriage can be used by rotating it by 180 degrees with respect to the fixed member, there is an advantage that it can be used even if the installation location of the pipe for the pipe fitting attached to the carriage is changed. In addition, since the carriage that slides against the fixed member is supported by a long bearing that is integrated with the fixed member, a carriage sliding device with excellent load resistance can be obtained even when the stroke of the carriage becomes very large. It has the effect of Furthermore, a large diameter portion is formed at one end of the piston rod protruding from the cylinder chamber, and the piston rod is supported by the cylinder chamber on the connecting pin moving portion side via the large diameter portion, so that the piston rod is acted upon from the reciprocating table. Since the reaction force immediately stops acting on the bearing part of the cylinder chamber, that is, the partition member,
The effect of improving durability can be obtained.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention, and FIG. 1 is a perspective view of a carriage sliding device according to the present invention, FIG. 2 is an exploded perspective view of a fixing member, a piston, and parts related to these parts, and FIG. 4 is a bottom view of the carriage sliding device according to the present invention, FIG. 7 is a longitudinal sectional view taken in the direction indicated by the - arrow in FIG. 5, and FIG. 8 is a longitudinal sectional view taken in the direction indicated by the - arrow in FIG. 1 is a carriage sliding device, 2 is a fixed member, 3 is a carriage, 4 is a partition member, 5 is a piston, 10 is a cylinder chamber, 10a is a piston sliding section, 10b is a connecting pin moving section, 16 is a bearing device 36 is a piston rod, and 43 is a connecting pin.

Claims (1)

[Claims] 1. A fixed member forming a cylinder chamber, a reciprocating table slidably inserted into the fixed member via a bearing device, and the cylinder chamber is divided into two chambers, a piston sliding part and a connecting pin moving part. a partition member fixed to the cylinder chamber so as to be divided; and a piston rod slidably fitted into the piston sliding portion of the cylinder chamber, inserted into the partition member, and protruding into the connecting pin moving portion of the cylinder chamber. a piston equipped with a connecting pin that penetrates the fixing member and is inserted into a connecting hole formed in the carriage at one end; A slidable large diameter portion is formed in the cylinder chamber on the side, and the piston rod protruding from the partition member is supported by the cylinder chamber on the connecting pin moving portion side via the large diameter portion. and is configured to reciprocate the piston by supplying and discharging fluid to both sides of the piston in the cylinder chamber, thereby reciprocatingly sliding the reciprocating table along the fixed member via the connecting pin. A carriage sliding device.